let arr1: [string, number] 
let arr2: [string, boolean?]
let arr3: [string, ...number[], boolean]
let arr4: [string, boolean?, ...number[]]

arr1 = ['niuniu', 123]
arr2 = ['niuniu']
arr3 = ['niuniu', 123, 3, 4, 5, true]
arr3 = ['niuniu', true]
arr4 = ['niuniu', true, 1, 2, 3]
arr4 = ['asdf']

export {}